2) Slice chicken breasts through the middle, forming a pocket. Spread softened butter or margarine on inside of chicken breasts and sprinkle with garlic salt and pepper. Stuff well with the onion mixture. Wrap chicken breasts carefully with two pieces of prosciutto each.

3) Place on baking sheet and place in oven preheated to 375 degrees. Bake for 30 minutes, baste with 2 Tblsp melted butter or margarine and cook for an additional 10 minutes.

4) Remove from oven and let stand for 5 to 10 minutes to redistribute juices.